Scalability
Applications need to scale for increasing numbers of simultaneous users on a wide range of Web access devices.
By adding one or more Web servers to the existing one, you can prevent a single Web server from becoming overloaded. The incoming requests are then dispatched to a group of servers, called a cluster. A cluster is a group of independent nodes interconnected and working together as a single system.
A load balancer software is used to dispatch the load to the Web servers in the cluster. It uses a load-balancing mechanism usually known as IP spraying, which intercepts the HTTP requests and redirects them to the appropriate machine in the cluster, providing scalability, load balancing, and failover.
WebSphere is a trademark of the IBM Corporation in the United States, other countries, or both.
IBM is a trademark of the IBM Corporation in the United States, other countries, or both.